NATE Exam: Air Conditioning and Heat
Pumps 2024/2025 Exam Questions and
Answers | A+ Score Assured
Which of the following factors affects a customer's level of comfort?
a. Air movement
b. Humidity
c. Temperature
d. All of the above - 🧠ANSWER ✔✔d (All of the above: air movement, humidity,
temperature)
A cooling load calculation estimates the sensible heat gain of a structure. The
maximum sensible capacity of a cooling-only system should be within ____% of
this calculated value.
a. ±10%
b. +10%
c. +15%
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,d. +30% - 🧠ANSWER ✔✔c (+15%)
The maximum sensible cooling capacity of a heat pump should be within ____%
of the calculated sensible heat gain of a structure with a large heating load.
a. ±10%
b. +15%
c. -25%
d. +25% - 🧠ANSWER ✔✔d (+25%)
The combined output of a heat pump and its auxiliary heat should not exceed
the calculated heat loss of a home by more than ____%.
a. 10%
b. 15%
c. 20%
d. 25% - 🧠ANSWER ✔✔b (15%)
What amount of auxiliary electric heat is needed when the output of a heat
pump on a design day equals 18,800 Btuh and the heat loss of a home is 29,700
Btuh?
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,a. 2.1 kWh
b. 3.2 kWh
c. 5.0 kWh
d. 10.9 kWh
Note: 3,413 Btu/kW - 🧠ANSWER ✔✔b (3.2 kWh)
The three processes that transfer heat energy are conduction, convection, and
____.
a. concentration
b. radiation
c. refraction
d. static pressure - 🧠ANSWER ✔✔b (radiation)
Heat transfer that occurs when substances of different temperatures are in
contact with each other is called ____.
a. concentration
b. conduction
c. convection
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619652435. TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED
, d. radiation - 🧠ANSWER ✔✔b (conduction)
What effect does raising the pressure in a sealed system have on refrigerant?
a. It becomes more difficult to subcool the liquid refrigerant
b. It becomes more difficult to superheat the refrigerant vapor
c. The refrigerant's boiling point decreases
d. The refrigerant's boiling point increases - 🧠ANSWER ✔✔d (The refrigerant's
boiling point increases)
What is the primary danger to people near an accidental refrigerant release or
spill?
a. Blurred vision caused by the refrigerant vapor coming in contact with the
eyes
b. Changes in weather patterns caused by global warming
c. Damage to the food chain caused by decreased ozone levels in the
stratosphere
d. Suffocation caused by the heavier refrigerant displacing oxygen in the air -
🧠ANSWER ✔✔d (Suffocation caused by the heavier refrigerant displacing
oxygen in the air)
Page 4 of 41
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER:
619652435. TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED
Pumps 2024/2025 Exam Questions and
Answers | A+ Score Assured
Which of the following factors affects a customer's level of comfort?
a. Air movement
b. Humidity
c. Temperature
d. All of the above - 🧠ANSWER ✔✔d (All of the above: air movement, humidity,
temperature)
A cooling load calculation estimates the sensible heat gain of a structure. The
maximum sensible capacity of a cooling-only system should be within ____% of
this calculated value.
a. ±10%
b. +10%
c. +15%
Page 1 of 41
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER:
619652435. TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED
,d. +30% - 🧠ANSWER ✔✔c (+15%)
The maximum sensible cooling capacity of a heat pump should be within ____%
of the calculated sensible heat gain of a structure with a large heating load.
a. ±10%
b. +15%
c. -25%
d. +25% - 🧠ANSWER ✔✔d (+25%)
The combined output of a heat pump and its auxiliary heat should not exceed
the calculated heat loss of a home by more than ____%.
a. 10%
b. 15%
c. 20%
d. 25% - 🧠ANSWER ✔✔b (15%)
What amount of auxiliary electric heat is needed when the output of a heat
pump on a design day equals 18,800 Btuh and the heat loss of a home is 29,700
Btuh?
Page 2 of 41
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER:
619652435. TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED
,a. 2.1 kWh
b. 3.2 kWh
c. 5.0 kWh
d. 10.9 kWh
Note: 3,413 Btu/kW - 🧠ANSWER ✔✔b (3.2 kWh)
The three processes that transfer heat energy are conduction, convection, and
____.
a. concentration
b. radiation
c. refraction
d. static pressure - 🧠ANSWER ✔✔b (radiation)
Heat transfer that occurs when substances of different temperatures are in
contact with each other is called ____.
a. concentration
b. conduction
c. convection
Page 3 of 41
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER:
619652435. TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED
, d. radiation - 🧠ANSWER ✔✔b (conduction)
What effect does raising the pressure in a sealed system have on refrigerant?
a. It becomes more difficult to subcool the liquid refrigerant
b. It becomes more difficult to superheat the refrigerant vapor
c. The refrigerant's boiling point decreases
d. The refrigerant's boiling point increases - 🧠ANSWER ✔✔d (The refrigerant's
boiling point increases)
What is the primary danger to people near an accidental refrigerant release or
spill?
a. Blurred vision caused by the refrigerant vapor coming in contact with the
eyes
b. Changes in weather patterns caused by global warming
c. Damage to the food chain caused by decreased ozone levels in the
stratosphere
d. Suffocation caused by the heavier refrigerant displacing oxygen in the air -
🧠ANSWER ✔✔d (Suffocation caused by the heavier refrigerant displacing
oxygen in the air)
Page 4 of 41
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER:
619652435. TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED
